# Efficacy of Methylene Blue Plus Ropivacaine for Post-Hemorrhoidectomy Pain.

> **NCT07164807** · PHASE4 · NOT_YET_RECRUITING · sponsor: **The Affiliated Hospital of Putian University** · enrollment: 177 (estimated)

## Conditions studied

- Mixed Hemorrhoids
- Milligan-Morgan Hemorrhoidectomy
- Methylene Blue

## Interventions

- **DRUG:** Methylene Blue (0.3%) with Ropivacaine Hydrochloride (0.75%)
- **DRUG:** Methylene Blue (0.1%) with Ropivacaine Hydrochloride (0.75%)

## Key facts

- **NCT ID:** NCT07164807
- **Lead sponsor:** The Affiliated Hospital of Putian University
- **Sponsor class:** OTHER
- **Phase:** PHASE4
- **Study type:** INTERVENTIONAL
- **Status:** NOT_YET_RECRUITING
- **Start date:** 2025-08-30
- **Primary completion:** 2026-08
- **Final completion:** 2026-12
- **Target enrollment:** 177 (ESTIMATED)
- **Last updated:** 2025-09-10


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT07164807

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT07164807, "Efficacy of Methylene Blue Plus Ropivacaine for Post-Hemorrhoidectomy Pain.". Retrieved via AI Analytics 2026-06-23 from https://api.ai-analytics.org/clinical/NCT07164807. Licensed CC0.

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